#include "StdAfx.h"
#include "MyModel.h"

MyModel::MyModel(QObject *parent)
  : QStandardItemModel(parent)
{

}

MyModel::~MyModel()
{

}

bool MyModel::dropMimeData (const QMimeData* data, Qt::DropAction action, int row, int col, const QModelIndex &parentIndex)
{
  //////////////////////////////////////////////////////////////////////////
  // If this routine returns true, everything works as expected.
  // HOWEVER, if we return false for any reason, the DROP does not occur,
  // but the item being DRAGGED still disappears!!! (I assume this is 
  // because we setDefaultDropAction(Qt::MoveAction) on the treeView).
  // 
  // In the example below, I was hoping to disallow drops if we were at the 
  // top level of the tree (i.e. our parentIndex was inValid) and I thought 
  // that returning false would do the trick.
  //
  // Is this a bug in Qt, or am I missing something???
  //////////////////////////////////////////////////////////////////////////

  bool result = false;
  if (parentIndex.isValid())
  {
    if (data->hasFormat("application/x-qstandarditemmodeldatalist"))
    {
      result = __super::dropMimeData (data, action, row, col, parentIndex); // Call the base class implementation...
    }
  }

  return result;
}